What are the impacts?
If you don't upgrade to a version of Campaign which support TLS 1.1, your connection to Salesforce CRM will be down on July 22, 2017.
It will be impossible to communicate with SFDC from Campaign.

How can we solve this issue?
For customer on versions prior to 6.1.0, contact your customer success manager to learn more about the options available to you for upgrading.
For customers on version 6.1.0 and above please contact with Customer Care.

Is the migration complex?
It depends on your current version of Adobe Campaign.

Customers on version 6.1.0: need to upgrade to build 8192 to stay compliant and ensure no disruption of service. Migrating from a 6.1.0 build to another 6.1.0 build is a simple upgrade.

Customers running versions prior to 6.1.0: please contact your customer success manager or account manager to review the upgrade options for your system. A migration for a version prior to 6.1.0 to a 6.1.1 or v7 needs to be analyzed by our Professional Services.